DNA and Transcription Review

Double Helix is best described as …

• The specific pairing of bases in DNA: A to T and C to G
• The name of the twisted shape of the DNA molecule, as it contains two strands.
• The weak bonds that hold the two strands of DNA together. 
• Guanine - the base that pairs with Cytosine

“A” is used to represent which nitrogenous base?

• the base that pairs with Thymine
• the base that pairs with Cytosine 
• the base that pairs with Guanine
• the base that pairs with Adenine

Hydrogen Bonds

• The weak bonds that hold the two strands of DNA together.
• The bases that pairs with Adenine
• The specific pairing of bases in DNA: A to T and C to G 
• Forces that together with the sugar make the backbone of DNA

Which of the descriptions best represents the Phosphate group in a DNA diagram? 

• Together with the phosphate molecules makes the DNA backbone 
• T- the base that pairs with Guanine
• Together with the sugar it makes the backbone of DNA 
• One of four different bases. The order of these bases makes the genetic code

The letter “T” is used instead of which base in DNA?

• Thyroxin
• Thyroid
• Triose phosphate
• Thymine

Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG

• ATG TGA CAG
• TAC ACT GTC
• GTA AGT GAC
• CAT TCA CTG

Which of the following units are repeatedly joined together to form a strand of DNA?

• amino acids
• nucleotides
• fatty acids
• polysaccharides

In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of

• cytosine
• guanine
• thymine
• uracil

Nitrogenous bases are joined by which type of bond?

• polar bonds
• ionic bonds
• covalent bonds
• hydrogen bonds

Tags

NGSS.HS-LS1-1

The enzyme that unzips the DNA to prepare for replication

• helicase
• replicase
• polymerase
• synthase